condition	mean	min	max
4 h after light	16.740424	16.084478	17.39637
8 h after light	17.224335500000002	16.681659	17.767012
12 h after light	16.9539775	16.511585	17.39637
4 h after dark	18.260855	17.39637	19.12534
8 h after dark	17.681743	17.39637	17.967116
12 h after dark	16.058753	16.058753	16.058753